The TPMS system is the shorten word of Tire Pressure Monitoring System. This system monitors the pressure of the tire and when it drops below a certain pressure, the TPMS ECU makes the warning lamp turn on for notifying the driver. This system consists of TPMS ECU(or TPMS Receiver), Initiators and TPMS sensors. Among components of TPMS system, the TPMS sensor is installed at each wheel rim. and its role is to measure the air pressure and the temperature of the tire and then it transmits its signals to TPMS ECU. The communication from TPMS sensors is done via RF(Radio Frequency) at a frequency.
The TPMS ECU monitors the voltage of sensor's battery and if it is below 2.2 V, this DTC is set.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Monitoring the battery of TPMS sensor |
•
Battery discharge of Rear Left TPMS sensor |
Enable Conditions |
•
The lowest sensor's temperature which is recently measured > 14℉(–10℃) | |
Threshold value |
•
The sensor's battery voltage < 2.2 V |
